Direction signal switch



0- I2, 1954 c. w. LINCOLN l-:rAL 2,691,704

DIRECTION SIGNAL 'SWITCH Filed Feb. '15, 195o Y s sheets-sheet 1 MMY Gttoruegs Ot. 12, 1954 c. w. LINCOLN :TAL

DIRECTION SIGILI.. SWITCH 3 Sheets-Sheet 2 Filed Feb. 15. 1950 Opt. l2, 1954 C, |N0| N UAL 2,691,704

'DRECTION sIGuAL SWITCH Filed Feb. 15, 1950 3 Sheets-Sheet 5 Summers Patented Oct. 12, 1954 12,691,704 DIRECTION SIGNALLsWiroH *Clovis Linc'ln,Phi1ip B. y'Zeiglexg 'and Henry D. Spiekerman, Saginaw, "ll/lich., assign'rs to `General Motorsv Corporation, fDetr'oit, Mic-h., fa corporation of-,Delaware Application February 15, 1950,Seria1`No."144;?04

The presentinvention relates to direction signaling systems and. more particularly to direction signaling devices for controlling suchsystein's In vehicle direction signaling systems invvhich they setting of' the signalingl device is' obtained by manual` operation land resetting 'of 'the' device is obtained by the operation of the steering' mechanism, particularly the steering Wheel, itihas` been found 'that' thel device frequently overtravelsits neutral position because of the speed` of rotation of' thel Wheel and inertia ofthe mechanism 'of the signaling device asthevvheel returnsfroin aposition for'turningthevehicle to `ap'osition fora straight directional path' of thevehicle. Such' a cond'ition'of operation'is undesirable as'it requires the attention of the'op'erator to reset the vdevice manually. Moreover, with signaling devices depenclent upon the'rotation ofthe steering wheel of a vehiclefor the resetting' of the device, the'lodging of a foreign object in the "resetting mechanism frequently' causes a" locking ory freezof 'the 'steering mechanism'tvhi'ch'sdangerous and requires servicing "beforethe vehicle is safe'for driving.

Accordingly it'is an object ofthe present invention to 'provide animprovecl direction signal device for `such systems.

It is 'a'further object to' provide' a' direction signal deviceso constructed and arranged as to be substantially 'free of overtravel ofthe operating `mechanism and locking or "freezing "of "thesteerngmec'hanisrn.

eration of .the steering mechanism.

"For a V*better understanding of "the invention, reference may befhad'to'the accompanying'drawings'in'which Figure 1 is 'a plan vi'ewwthparts in s'ectinan'd parts'broken away taken on line -I--il'of Figure Zand illustrating a'turn signaling "device embodyingthepresent invention; Figure 2"is an elevational view of the "device shovvnas being mounted on the steering colum'nof avehicle with parts broken away and'pa'rts -in sec-- tion; Figure 3 is anenlar'ged vieWtaken-on line "'3-33 of Figure 1; Figurefiis a Zfragmentary view taken on lined- "4 of Figure 2; Figure-5 is-afra'gmentary view's'imilarto Figure `1 illustrating the "'devicei'n' one otits operating positions; Figure 15 Claims. (CI. 20D-($1.34)

,30 trielever;and'covesr. rheliowerendf-cfthepiniio lsecumd on a *hub `-"52 extending upwardly lfrom urged against stops 53 extending upwardly from the cross member 42 by a spring 43. The operating lever I8 extends outwardly of the housing through an elongated aperture 04 in the body member 2 and is provided with a recess 56 adapted to receive a spring 58 and a ball member 60 which is yieldingly urged by the spring into engagement with a wall surface in the cover member 4 having a plurality of indexing grooves 62 as illustrated in Figure 4.

To provide means for yieldingly urging the operating lever I8 to a neutral position of operation for the direction signaling device and dampen the overtravel of the operating lever during its return to a neutral position from an operating position, a bar spring 66 is positioned Within the housing with its ends secured between posts 68 projecting upwardly from the body member 2. With the bar spring 66 positioned as illustrated in Figure 1, it is in normal engagement with the bushings 48 and a clockwise or counterclockwise rotation of the operating lever I8 consequently causes the bar spring 66 to yield as illustrated in Figure 5. To obtain a yielding of spring 66 Without a simultaneous yielding of the legs of spring 50 and consequent shifting of pins 45 in the slots 44, spring 50 is provided with a spring pressure greater than that of spring 66. Consequently, the pins 45 carrying the resetting dogs 46 shift in the slots 44 when an object becomes wedged in the path of one of the resetting dogg and resetting ears 'I0 or when the operator maintains the lever in an operative position manually as will be described in more detail hereinafter. l'n returning the operating lever I8 to its neutral or normal position in response to the operation of the resetting ears l0, the resetting ears may move at a rate of speed which will provide suflicient inertia forces to the operating lever to induce it to travel beyond its neutral position. With the spring bar 86 positioned as described it will provide a damping action against the overtravel of the operating lever I8.

To provide a signal indication that the lever is in one of its operating positions a pilot lamp 12 is secured Within the housing adjacent a colored window 74 secured in the wall of the body member 2. A suitable electrical path to ground is provided for the pilot lamp I2 by a threaded screw 'I3 threadedly recessed in the body 2 and adapted to bite into the metal of the steering column l2.

To reset the lever I8 to its neutral position in response to the rotation of the steering wheel I4 of the vehicle, the diametrically opposed resetting ears T are formed on an annular ring 'I6 which is slidably mounted on a generally conically shaped ring 'I8 adapted to be attached to the hub of the steering wheel I4. The annular ring 'I6 is positioned on the ring 'I8 With one of its surfaces 80 in frictional engagement with the surface 82 of member 'I8. To provide for the frictional engagement of the surfaces 80 and B2 a washer 84 which may be of the Belleville washer type is secured on the member I8 by any suitable means and yieldingly urges the surface 80 of ring 'I6 into engagement with the surface 82 of member 18 as illustrated in Figure 2.

In operation, the operating lever may be moved in a clockwise or counterclockwise direction. As shown in Figure 5, movement of the lever in a counterclockwise direction to the limit of its travel as determined by the aperture 64 causes one of the resetting dogs 46 to be moved into the path of the resetting ears l0. With the lever in its operating position, as shown, the steering wheel I 4 may be rotated in a counterclockwise direction until one of the ears 'I0 engages the inner edge and corner of the resetting ear moved into its path by the counterclockwise movement of the lever. Continued counterclockwise rotation of the steering wheel causes the resetting dog to rotate in a clockwise direction on the pin and against the pressure of spring 43 until the dog is clear of the path of the resetting ears. Upon reversal of the direction of rotation of the wheel I4, one of the ears engages the arcuate camming surface of the dog `and a component of force acting through the dog and pin applies a clockwise force to lever I8 about pin 2 0 which returns the lever to its neutral position. Likewise, a movement of the operating lever I8 in a clockwise direction to its other operating position will place the other resetting dog 46 in the path of the resetting ears 'I0 and a resetting action will occur substantially the same as hereinabove described in connection with the clockwise movement of the lever I8. Should a foreign object become lodged in the housing in such a manner as to be placed in the path of the resetting dogs 46 and the resetting ears'I the provision of the elongated slots 44 permits the movement of the resetting dogs 46 against the pressure of spring 50 to a position in the elongated slots which will clear the foreign object and permit the resetting ear 'I0 to rotate without locking the steering mechanism of the vehicle. Further, the slots 44 perform an additional useful function in that they permit the dogs 46 to clear the resetting ears I0 when the switch handle is maintained in an operative position by the operator. If, for example, the operating lever I8 is moved to indicate a left turn, as illustrated in Figure 5, and held in this position while the steering wheel is rotating clockwise in its normal resetting movement the resetting ears I0 will apply pressure to the dog 46 in their path and cause it and the pin 45 to slide back in the slot 44 out of the path of travel thus preventing any damage to the mechanism. Likewise as an added safety precaution against the freezing or locking of the steering mechanism the ring member I6 being in frictional engagement with the member 'I8 permits relative movement between the two members Without the freezing of the steering wheel mechamsm.

To index the operating lever I8 in either of its operating or neutral positions the indexing grooves 62 are provided in the inner wall of the cover member 4 as illustrated in Figure 4. The grooves 62 are adapted to receive the yieldingly urged ball which provides a restraining action against movement of the lever from any one of the three positions.

A turn signal device such as We have hereinabove described is particularly adapted for operation in a direction signaling system such as that schematically illustrated in Figure 6 of the drawings. In the system illustrated in Figure 6, a battery 86 has one terminal connected to ground by conductor 88 and the other terminal connected by a conductor 90 to the armatures 92 and 94 of a current interrupting device 96 such as those commonly used at the present time in direction signal systems. The armature 94 carries a contact member 91 which is connected through a hot wire 98 and resistor |00 to a fixed contact 103 and the solenoid coil I04. The armature 92 carries a contact |06 adapted to engage a xed contact |08 connected through conductor IIO, filament II2 of the pilot lamp 'I2 and conductor II4 to ground. The solenoid coil |04 of ztheccurrentiinterrupting `device 396 `ist connected ffbyra :conductor |61v and a, jumperfstrap 1 Hi8 to contact-'terminals |20 and f t2 2 i :attached-.to the aterminal 1 plate e36 .fof :the :switch -32 i as shown. .zSpaced-from the-...contact terminalsf |20 and.' |22 tare: the-..contact: terminals, |24 and; |.26ewhiclrare connected respectively to .ground through 4con- `ductors.|21and.|28, filaments |30.and |32 and conductorsl34and |36. Also .mountedonfthe .terminal plate 36 are the. contact terminals |138 ..and. |.40.which are connectedrespectively to the :filaments |42. :andY |441.of.the rightandleft'. rear lamps -by-the fconductors` ||6fandV I 48. `The other ,terminals of- `filamentsl |42-..and. |44A are connect- :ed to-.ground through the conductors |50 .and v.1.52. .To provide for bridging. the. plurality of. con- .tact..terminals.the. rotor.-30 ofthe switch.32 .car-

ries..the..c.urrent.carrying members |54, |56.fand |58. l.As,illustrated.schematically in Figure 6, the .currentcarrying.member. |58 is in contactwith the contact terminal members |38 andl40 .and .is likewise connected through contact terminal |60. and. conductor. |62..to one terminal of a .brake .,operatedswitch; |64. The other terminal of the .switch |641. is connectedtthrough conductors |66 and" 9 0, tothe battery.

"In the .operation of V.the .direction signaling systeme counterclockwise rotation ofthe lever I8 causes the rotor30 of the switch'32 to. rotate :counterclockwise with the .current -`carrying member |56 providing ka lbridging of .the contact v'terminals |22,l |26 and` |40. 'A signaling circuit visthenprovided to the left front and rear sigmaling' lamps from theJ battery 86 through cony'ductor60, .armature 94,l hot wire.98, resistor |00, .conductorl`02, solenoid coil |04 and `conductor |l6. "With'current-passing through this circuit, thehot Wire 98 expandsoausing an engagement Moff'contacts i91and I03toxbypass resistor'|00.

This provides lfor the flashing :of the laments of "the: left :front vand Yrear signaling lamps. At the-same time, the'armature'92 with its contact `|06is caused bythe Imagnetic forceofthe solenoid coil |04 to engage 'contact terminal v|08 energizing therpilot 'light 12to` provide a visual "signalfor-the operator indicating a flashing of thele'ft front and 'rear signaling lamps. With the; bypassing ofe theV Ahot vwire 98 and the resisr torV the"l hot Wire- 98--is `cooled causingthe con- 'tactsefA and |031toopen and placingthe'resis- `tor-back incircuitfrom'the battery to the left frontfandI-'left rear signal'lamps. vWiththe left 'fronte and rear signaling' lamp circuits energized "thefoperatorf may indicate astop by depressing thelbrake-pedal'thus closing the brake operated 'switch |f64to1-energizea circuit from the battery F861'through-'conductors*90, |66, |62, contact'ter- 'minal 1I|'0,ffcurrent4 carrying member |58, con- 'rtactiterminalk |38-and conductor |46 to the filaement|421of the right'rearsignaling lamp. With .60

the brake operatedswitch closed, the right rear isignalinglamp'isenergized withfa steady curz-rent'low thereby `providing a steadyv light signal anthezright'rear;of;the1vehiclei andan intermitf.tent.light.-.signal. at'theleft rear of the vehicle.

.fpositiontwillcause 1an* unbridgingfoi?l the circuit .1 fromtztherfbattery torfthel left front. and rearfqsigcnalingrflampse; and Iaxbridging by thezcurrent :carzryingirnember 58 of the .contact terminals |38 andi |l|0tconnected` respectively to Aconductors |46 .fa-nd: |48. .Cor-isequently,with thefswitch 32 inits z neutral :;position, operation 1 of :the brake L switch r'willxclose:apcircuit' from the .battery throughcon- 30 ,passing wthrough .one .-end of f the.. lever.

.6 vrenticarryingfmemberf |58, contact terminals |38 .:and |40 and conductors |46and |483to-,the1-lar ments: .of theA Tightend left.; rear lamps. It Awill 7meamparent that-.with azclockwisel movement `of i dever.- |8:.-aI ,similar switching. .arrangement will be ig. provided to intermittently.Y energizezthe laments |30- and1|42`nflthe rightfront and rear.V signal- L ing lamps.

:.In Figures -7-and 8-. of .the drawings We have .r i0 n illustrated. af :modification of our inventionwhich -is :substantially similar to the direction signal .device-fof vliguresfl through 5 inc1usive except that there is noresetting mechanism provided. .In Vthis' :modification the housing comprises the `l5 body member |68 and the cover member `|10.

,.'Ihebodymemberis .preferably a die-casting .havingthe'recess|12 and a-l plurality of. index- -ing igrooves. |14-:simi-larto ,the indexing grooves .illustratedffin Figure 4. The. cover ,member 10 :x isi preferably fa metal stampingprovided with .an

elongatedeaperture- |16 vandfthe aperture |18 .surrounded :by: the inwardly .extending .collar |80. .The body fand. cover members |68 and |10 are esecured togetherby the threaded screws |8| `and w -|82 .the latter also-.being adapted to Asecure the n washers |92.and=|94. Diametrically opposed hat portions |96 on the pin provideforsecuringa rotor- |98 to rotate .with'thepin within a terminal plate..200 offan electricalswitch202tattached `tonthecover-.member by threaded screws 204.

.40 Therotor |98 is provided with the current carry- -ing members adapted when the lever and rotor ...areinaoperative positions to engage contact terlminals Aas described hereinbefore in connection with-.switch E32. -To provide la visual signalto .the .operator yofcircuit.energization, va pilot lamp prising .two parts,.the operating handle and the .portion .carrying .the `pin both 0f which are Vjoinedtogether as. a unitarystructure as by sol- -ldering or welding.

)The .operation of the modified device illustrat- -ed in' Figuresf7.-and 8 is substantially the same asthatof Figures .1.to5 inclusive except-that the resetting operation is manual instead of automatic.

Whilethe embodimentsof the present inven- .tion `as '.herein ydisclosed constitute preferred ln Arfreturn ofithe operatinglever. |8to`its` neutral ,-.forms,.it.is.to .be understood rthat other forms mightbe adopted, all coming within thescope 1 of the .claims which follow.

What we claim as new and desire to secure l `byL-ettersPatent ofthe United States is:

1. Inra .direction signaling device, a housing havingagplurality of adjacent recesses in one `ivvall x.and fan aperture providing communication `r:between the exterior aandinterior thereof, an

:operating fleverv havinga;laterallyrextendingf` pin attached to one end thereof, said lever and pin being positioned in said housing, the pin ends journaled in the inner walls thereof and the lever extending outwardly through said aperture, a rotary switch comprising a terminal plate having a plurality of terminal contact members and a rotor having a plurality of current carrying members for engaging said contact members, said terminal plate being attached to said housing and said rotor being mounted on said pin and a detent member positioned in said lever and yieldingly urged outwardly for engagement with said recesses to provide for positioning said lever and rotor in a plurality of signaling positions.

2. In a direction signaling device, a housing having a plurality of adjacent recesses in an inner surface of an outer wall thereof and an elongated aperture providing communication between the interior and exterior thereof, an operating lever pivotally mounted in said housing and extending outwardly through said aperture, a pair of spaced dogs pivotally mounted on said lever and yieldingly urged into engagement with stops therebetween, said dogs being movable with said lever into the path of resetting means adapted to engage and rotate said dogs when moved in one direction and engage said dogs and cause rotation of said lever to a position in which the resetting means clears said dogs when moved in the opposite direction, an electrical switch connected to said lever and actuated thereby, and detent means recessed in said lever and yieldingly urged into said recesses to position said lever and switch in a plurality of signaling positions.

3. In a direction signaling device, a housing, an operating lever pivotally mounted in said housing, said lever having a pair of spaced elongated slots thereon, pins extending upwardly therefrom and slidably mounted in said slots, said pins being yieldingly urged to one end thereof, dogs pivotally mounted on said pins, stops attached to said lever between said dogs for engagement therewith, spring means yieldingly urging said dogs into engagement with said Stops, said lever being movable to place one of said dogs in the path of resetting means adapted to engage and rotate said dogs out of the path of said resetting means when moved in one direction and engage said dogs to rotate said lever to a position where the dogs clear said resetting means when moved in the opposite direction, an electrical switch positioned in said housing and connected to said lever for actuation thereby and spring means attached to and extending across y,said housing for engaging both of said upwardly extending pins when said lever is in a neutral position and to engage one of said pins when said lever is in an operative position whereby said spring means yieldingly urges said lever to its neutral position.

4. In a direction signaling device, a housing having an elongated slot in one wall, a cover member adapted to enclose said housing, said cover member having a plurality of positioning grooves in its inner wall, an operating lever having a cross member with elongated slots adjacent the ends of said cross member, a pin secured in said operating member and extending laterally therethrough, said operating lever and pin being pivotally mounted in said housing and cover membei` and extending outwardly through said elongated slot, dogs pivotally mounted in said elongated slots and yieldingly urged to one end thereof, stops on said lever between said dogs, means yieldingly urging said dogs into engagement with said stops, spring means secured in said housing for yieldingly urging said operating lever to a neutral position, said lever being movable to a position to place one of said dogs in the path of a resetting means adapted when moved in one direction to engage and rotate said dog out of the path of said resetting means and when moved in the opposite direction to engage said dogs and move said dogs and said lever to a position clearing said resetting means, a rotary switch comprising a terminal plate provided with a plurality of contact terminal members and a rotating member provided with current carrying members, said terminal plate being secured to said housing and said rotating member being secured to said pin, a detent member recessed in said lever and yieldingly urged into engagement with one of said grooves for indexing the position of said operating lever.

5. In combination with a Vehicle having a steering column and a steering wheel with resetting means including outwardly extending ears attached thereto, a direction signaling device having a housing with an elongated aperture providing communication between the interior and exterior thereof, a cover member adapted to enclose said housing, said cover member having a plurality of indexing grooves in its inner wall, an operating lever having a cross member with elongated slots adjacent the ends thereof, a pin lsecured in said operating member and extending laterally therethrough, said operating lever and pin being pivotally mounted in said housing and l.cover member and extending outwardly through said slot, a pair of dogs pivotaily mounted in said elongated slots, stops between said dogs and on said lever, means yieldingly urging said dogs into engagement with said stops, said lever being movable to place one of said dogs in the path of said resetting means for rotation of said dog out of the path of said resetting means when said steering wheel is rotated in one direction and for engaging said resetting means and rotating said lever to a position clearing said dogs from the path of said resetting means when said steering wheel is moved in the opposite direction, spring means attached to said housing and yieldingly .urging said operating lever to a position with said dogs out of the path of said resetting means, a rotary switch comprising a terminal plate provided with a plurality of contact terminals and a rotating member provided with current carrying members, said rotating member being secured to ,said pin and said terminal member being secured to said housing, and a detent member recessed in said lever and yieldingly urged into engagement iwith one of said indexing grooves for indexing the position of said operating lever.

6. In a direction signaling device, a housing, an operating member having a cross member with elongated slots adjacent the ends thereof, resetting means for said operating member, a pin secured in said operating member and extending laterally therethrough, said operating member and said pin being pivotally mounted in said housing, pivotal dogs mounted in said slots, yieldable means urging said dogs toward one end thereof, stop means on said cross member limitling pivotal movement of said dogs in one direction, spring means urging said dogs against said stops, said dogs being pivotally responsive to `7:5,movement of said resetting means upon movement' olf said operating member, .said yieldable meansfbeingfresponsive *to abnormal pressureon said 'dogs to 'permit Aslidable movement of said dogsfirrsaid 'elongated slot, and. atransversely .extending ,plate spring adaptedto center saidoperating member.

7L 'A switch-operating mechanism .movable from aswitchv openpositionto switch closing positions onk either side of said switch open position, comprising, a lever, a switch operatively connected to said lever, handle means on said lever for actuating the latter to different positions of adjustment, automatic means for returning said lever and said switch to switch open position after adjustment thereof to switch closing position, said automatic means including bodily movable, pivotal dogs mounted on said lever, resilient means resisting pivotal movement of said dogs, and additional resilient means for resisting bodily movement of said dogs.

8. In a direction signaling device, a housing, an operating member movable to a plurality of adjusted positions, said member having oppositely extending legs provided with elongated slots adjacent the ends thereof, means for pivotally supporting said lever in said housing, rotatable resetting means for said operating member, dogs pivotally mounted in said elongated slots, said dogs being movable with said operating member into the path of said resetting means and adapted to rotate upon movement of said resetting means in one direction and to move said operating member upon movement of said resetting means in the opposite direction, said dogs being yieldably movable in said slots in response to movement of said resetting means in said opposite direction when movement of said operating member is oblstructed, and an electrical switch mounted in said housing for actuation by said operating member.

9. In a direction signaling device, a housing, an operating member pivotally mounted in said housing, said operating member having a cross member with elongated slots adjacent the ends thereof and a transversely extending portion having a struck up tubular member formed thereon, dogs pivotally mounted in said elongated slots, detent means mounted in said tubular member, rotatable resetting means for said operating member, said dogs being movable into the path of said resetting member in response to movement of said operating member, spring means permitting yieldable rotation of each of said dogs in one direction only, means on said operating member yieldably urging said dogs toward one end of said slots, said last mentioned means being adapted to permit said resetting means to` override said vdogs when abnormal resistance is encountered by said operating member into a position withdrawing said dogs from engagement with said resetting means, and a switch mounted in said housing for actuation by said operating member.

10. In a direction signaling device, a housing having an elongated slot therein providing communication between the interior and exterior thereof, an operating lever mounted in said housing comprising a handle portion extending outwardly through said slot and a supporting portion, a pivotal member secured to said supporting portion and rotatably supported in said housing, an electrical switch positioned in said housing and connected to said supporting portion for lactuation thereby, locating means in an inner surface of an outer wall of said housing, and a detent member mounted on said supporting portion between the interior andfexterior thereof,-an

operating lever mounted in said-housing comprising "a :handle portion, extending outwardly throughfsaidfslot and a supporting member hav- :inga struckup annularportioniormedthereon, l

a pivotal member secured to said supporting -member and rotatably mounted in said housing,

an electrical switch positioned in said housing and connected to said supporting member for actuation thereby, locating means in an inner surface of an outer wall of said housing, and a detent member disposed in said struck up annular portion on said supporting member and yieldingly urged into engagement with said lo- ,cating means.

12. A switch operating mechanism comprising an operating member, a guide slot, resetting /means for said operating member, a pivotal dog mounted in said guide slot, yieldable means urgfing said dog toward one end of said slot, and spring means resisting pivotal movement of said dog in one direction, said dog being pivotally re- (sponsive in the opposite direction to movement of fsaid resetting means, said yieldable means being [responsive to abnormal pressure on said dog to `permit slidable movement thereof in said slot.

13. In a direction signaling device, a housing, ,an operating member, means forming guide slots, resetting means for said operating member, pivotal dogs mounted in said guide slots, stop means limiting pivotal movement of said dogs in one direction, spring means urging said dogs against said stops, said dogs being pivotally responsive in one direction to movement of said resetting means, and yieldable means urging said dogs toward one end of said slots, said yieldable means permitting bodily movement of said dogs in said slots when said operating member is manually restrained in an operating position.

14. A switch operating mechanism comprising i a pivotally mounted operating lever, a switch operated by said lever to opened and closed position, rotatable resetting means for returning said lever to normal position after operation thereof to switch closing position, a pivotal dog shiftable by said lever into position for engagement by said resetting means to return said lever to normal position upon rotation of said resetting means in one direction and for actuation about its pivot upon rotation of said resetting means in the opposite direction, and yieldable means engaging said dog enabling bodily movement of said dog ,and pivot upon movement of said resetting means in said first mentioned direction when said operating lever is restrained again movement toward `its normal position.

15. A switch operating mechanism comprising an operating member, a dog, a guide slot, a pivot for said dog movable in said guide slot, resetting means adapted to swing said dog on said pivot to enable said resetting means to clear said dog upon movement of said dog ear in one direction, said resetting means bodily moving said dog along said slot to clear said dog upon movement of said resetting means in the opposite direction whereby said lever may be restrained against movement out of switch operated position without damage to said parts.

(References on following page) Number UNITED STATES PATENTS Name Date Arnold Aug. 27, 1935 5 Rushing Feb. 9, 1937 Nesson Mar. 19, 1940 Mayer June 25, 1940 Thirlwell Dec. 24, 1940 Thirlwell NOV. 25, 194:1 10

Number 12 Name Date Wilshusen June 2, 1942 Quillery June 30, 1942 Anderson July 30, 1946 Batcheller Apr. 8, 1947 Fuller Sept. 16, 1947 Lawson June 13, 1950 Hollins Oct. 10, 1950 Barcus May 13, 1952 

